Beck, Robert C. <br/><br/>
Motivation :   theories and principles / 
Robert C. Beck. 
 - 4th ed. 
 - New Delhi :  Pearson Education,  2000. 
 - xvi, 477 p. 
<br/><br/><label>ISBN: </label>8129700875 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychology
<br/><br/><label>Dewey Class. No.: </label>153.8  / BEC